virtualenv

virtualenv Used to manage python Project environment , Isolate a virtual... That only belongs to this project python Environmental Science (windows and Linux Use the same ).

First you need to install virtualenv modular

pip isntall virtualenv

Create a virtual environment for an engineering project

cd D:\project
virtualenv project_env

If the new python The virtual environment also needs the original python Third party library , Use the following command , Third party libraries can be copied together to a new virtual environment

virtualenv --system-site-packages project_env

If there are more than one python edition , such as python2.7、python3.7 etc. , You need to specify different versions of python Interpreter . Is not specified , It is usually set by default python Version to build

#Windows
virtualenv -p "D:\Program Files\Python37\python.exe" project_env2 Linux
virtualenv -p /usr/bin/python3. project_env

Activate the virtual environment

#Windows
cd D:\project\project_env\Scripts
activate.bat #Linux
source project_env/bin/activate

Shut down the virtual environment

#Window
deactivate.bat #Linux
deactivate

virtualenvwrapper

virtualenvwrapper It's encapsulated virtualenv Some characteristics of , More simple and convenient python Environmental management tools . and virtualenv The main difference is that it can manage multiple virtual environments in batches .

1.windows

install virtualenvwrapper Before , Make sure you have installed virtualenv,windows Installation required in environment virtualenvwrapper-win

pip install virtualenvwrapper-win

Create the first virtual environment

mkvirtualenv project1

Create a second virtual environment

mkvirtualenv project2

List all virtual environments

lsvirtualenv

Switch virtual environment

workon project

Stop the virtual environment

deactivate

Open virtual environment , Need to switch to the virtual environment script Folder

activate

Delete virtual environment

rmvirtualenv

2.Linux

Linux The platform needs to be installed virtualenvwrapper modular

yum install virtualenvwrapper

Start with command virtualenvwrapper

source /usr/local/bin/virtualenvwrapper.sh

The command is used in the same way , Indistinguishes windows and Linux.

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